Thousands of men of Jewish descent and hundreds of what the Nazis called 'full Jews' served in the German military with Adolf Hitler's knowledge and approval.
Cambridge University researcher Bryan Rigg has traced the Jewish ancestry of more than 1,200 of Hitler's soldiers, including two field marshals and fifteen generals (two full generals, eight lieutenant generals, five major generals), "men commanding up to 100,000 troops."
Here's one of the pictures that corroborates this. The picture shows 'Jewish' Senior Officers In Hitler's Army: Erhard Milch, Wilhelm Keitel, Walther von Brauchitsch, Erich Raeder, and Maximilian von Weichs during a Nazi rally in Nuremberg, Germany, 12 Sep 1938.
PS: In approximately 20 cases, Jewish soldiers in the Nazi army were awarded Germany's highest military honor, the Knight's Cross.